Kim Yu-seon has nice moments but also some problems

I watched Moonfishing in Aewol (2019) and Kim Yu-seon was one of the parts I kept noticing. There are good moments, especially when the scene is quiet. The performance is okay for the movie, but sometimes it feels a little flat. I can understand what the actor wants to do, but not every scene is strong. I wanted more detail, but it still has some useful emotion. Some parts are good, but other parts feel normal and not very fresh. This is only my personal view, but the performance changed how I enjoyed the film.